S BIO Physical

Black Nucleus

Bronya Zaychik

TierC
RolesDPS
Release2.2.2

Black Nucleus is Bronya's S-rank BIO-type Physical battlesuit from v2.2.2: a close-range cannon DPS who turns invisible with her Ultimate Evasion and QTE, hits hardest from the side or from behind, and bombards an area with her 20-hit Suppression Barrage. In her day she was the only battlesuit able to clear the Arena in 0 seconds (Marisa Impact), and she later received a PRI-ARM, Star Destroyer 19C-X, which Marisa Impact calls more of a fun upgrade than a useful one. With no Astral Ring, she is obsolete in 9.0 and only fits older content.

Black Nucleus

Physical DPS

Weapons

Star Destroyer 19C-X BiS
S
Her PRI-ARM and the BBS recommendation: barrage mode, over-the-shoulder aiming and +40% Crit Rate when cast while invisible.
Black Nucleus' PRI-ARM: its active opens a barrage mode of up to 8 scatter-shot Charged ATKs (+40% Total DMG, +8% Physical DMG stacking per shot, +60% Crit DMG within 5 m); on Black Nucleus it can be aimed over the shoulder and, cast while invisible, gains +40% Crit Rate and a 6s shorter CD.
Star Destroyer 19C
A
The base weapon of her PRI-ARM: scatter shells gain Crit DMG and bonus Fire DMG when they hit from behind, which suits her positioning.
Base version of Star Destroyer 19C-X: homing missiles and scatter shells gain up to +40% Crit DMG and bonus Fire DMG when they hit from behind, and the active fires 18 shells that knock enemies airborne and inflict Ignite Trauma.
Briareus EX
S
BBS universal pick: a Time Slow field that cuts enemy DEF (Time Slow also enables her QTE), stacking Crit Rate, and it counts as a missile weapon for her scatter shells.
Old PRI-ARM cannon with a time-slow, DEF-shredding field, stacking Crit Rate and a type-based bonus (+25% Elemental DMG on QUA and IMG wielders).
X-01 Azure Eye
B
BBS transitional 3★ missile cannon.
Budget 3★ missile cannon: up to 15 homing missiles per charge, and an active that, for 6.5s, makes the wielder's attacks slow enemies' Move and ATK Speed by 60% for 3.5s.

Stigmata

Schrodinger T Top
Planck M Middle
Sin Mal B Bottom
BBS recommendation: Schrödinger (T) boosts her charged shots, Planck (M) gives Basic and Charged ATKs +51% Physical DMG (but she takes more Physical DMG), and Sin Mal (B) adds +25% ATK Speed and +20% Crit Rate after invisibility.
Set effects
2pEach incoming hit has a 50% chance to deal 70% less damage; otherwise it deals 40% more.
3pAll buffs of this set's pieces gain a 10% higher trigger chance.
2pWeak hits (below 15 × the Valkyrie's level) no longer interrupt the wearer; on Bronya, ranged attacks get a 15% Total DMG Multiplier.
3pHitting an enemy heals 5% HP (CD: 5s); on Bronya, SP regen +30%.
2pSavage Halberd set. Becoming invisible stores a charge: when invisibility ends, it deals 200% ATK of Physical DMG to all enemies and the next Basic ATK immobilizes them for 3s. The pieces add Total DMG, DMG reduction, ATK Speed and Crit Rate around invisibility.
3pWhile invisible, heals 2% HP and restores 2% SP every 0.9s.
Schrodinger T Top
Planck M Middle
Lier B Bottom
BBS universal variant: Lier (B) gives +46% Physical DMG at full HP, which invisibility helps you keep.
Set effects
2pEach incoming hit has a 50% chance to deal 70% less damage; otherwise it deals 40% more.
3pAll buffs of this set's pieces gain a 10% higher trigger chance.
2pWeak hits (below 15 × the Valkyrie's level) no longer interrupt the wearer; on Bronya, ranged attacks get a 15% Total DMG Multiplier.
3pHitting an enemy heals 5% HP (CD: 5s); on Bronya, SP regen +30%.
2pNoble Stillness set. 15% chance to heal 5% HP on hit (CD: 2s); BIO-type wearers gain 15% max SP. On its own, the Bottom piece gives +46% Physical DMG at full HP.
3pBlocks one interrupting attack and knocks the attacker airborne (CD: 5s).
Sin Mal T Top
Sin Mal M Middle
Sin Mal B Bottom
Full Sin Mal is built around invisibility: Total DMG stacks while invisible, a Physical blast when it ends, and HP and SP regen while invisible. A thematic alternative.
Set effects
2pSavage Halberd set. Becoming invisible stores a charge: when invisibility ends, it deals 200% ATK of Physical DMG to all enemies and the next Basic ATK immobilizes them for 3s. The pieces add Total DMG, DMG reduction, ATK Speed and Crit Rate around invisibility.
3pWhile invisible, heals 2% HP and restores 2% SP every 0.9s.
Marco Polo T Top
Marco Polo M Middle
Marco Polo B Bottom
BBS transitional Physical set.
Set effects
2pAbove 25 combo hits, Combo and Charged ATKs deal 250% ATK of bonus Physical DMG on hit (CD: 5s).
3pAbove 25 combo hits, the wearer heals 200 HP every 5s.

Stat targets

  • Stigmata affixes: ATK, Crit Rate or Physical DMG
  • Always cast her weapon active while invisible
  • Release charged shots on the sequence change for +30% Crit Rate

Talent priority

Ultimate
Evasion
Passive
Basic ATK
Special ATK
Leader

Where to get her: Dorm Supply, War Treasury and Battle Pass; Marisa Impact advises new players against farming War Treasury battlesuits, so only invest in her if you already own her or like her playstyle.

Teams

Recommended teams

Part 1 Physical supports

Marisa Impact's standard Physical supports for Part 1 DPS: Herrscher of Rebirth for Impair and Crit, Reign Solaris for shield break, Stun Trauma and damage. No Astral Ring: older content only.

Budget Physical team

Herrscher of Sentience was the backbone of Part 1 Physical teams with her Impair (DEF reduction), and Terminal Aide 0017 is the cheaper third support. Outdated in 9.0, but fine for events and older content.

Guide

How to play

Invisibility loop

  • Her Ultimate Evasion (Dimensional Interruption) makes her invisible for 6s (CD: 16s with Particle Reset, and her leader skill shortens it further). While invisible she cannot be targeted, ignores all damage and common debuffs, and moves and attacks much faster.
  • Invisibility gives +35% Physical DMG (Stealth Assassination) that lasts until 2.8s after it ends. Tapping [ATK], casting a weapon skill or her Ultimate, or switching out ends invisibility, so use it to reposition before your burst.
  • Her QTE (Field Suppression, on airborne or Time-Slowed enemies) slams for 3 x 320% ATK of Physical DMG and also grants 6s of invisibility.
  • Field Breach: +39% Total DMG Multiplier when attacking from the side or from behind.

Charged cannon

  • Her Basic ATK is a charged cannon shot (Charge: Shrapnel Shell) with 3 charge sequences; with a missile-type weapon it fires scatter shells that explode on impact.
  • Release [ATK] right as a new charge sequence starts for +30% Crit Rate (Precision Charge). At SSS, releasing on the 3rd sequence adds 20% DMG and 100% Move Speed for 3s.
  • Getting hit while charging forces a dodge (once every 4s) without breaking the charge.

Burst window

  1. Ultimate Evasion (or QTE) → invisibility, then get behind the target.
  2. Cast Star Destroyer 19C-X's active while still invisible: +40% Crit Rate, a 6s shorter CD, and up to 8 barrage Charged ATKs (drag the weapon button to aim over the shoulder).
  3. Suppression Barrage (125 SP): an immobilizing field that bombards the area for 20 x 80% ATK of Physical DMG, +100% ATK per hit with Mortar Cannon, with Ignite Trauma procs and, from SS rank, 5 Stun Trauma.

Her kit predates Astral Rings and Part 2 enemy mechanics: keep her for older content, events and nostalgia.

Strengths

  • Invisibility makes her very safe: she cannot be targeted and ignores damage while it lasts.
  • A strong burst window with her PRI-ARM: +40% Crit Rate and a shorter weapon CD when cast while invisible.
  • Her leader skill shortens the CDs of the team's Ultimate Evasion and Perfect Defense effects.
  • Easy to get: Dorm Supply, War Treasury and Battle Pass (Marisa Impact).

Weaknesses

  • Obsolete: no Astral Ring, and Marisa Impact considers every War Treasury battlesuit outdated.
  • Positional: her Total DMG bonus needs side or back attacks, and invisibility ends as soon as she attacks.
  • Marisa Impact describes her PRI-ARM as more of a fun upgrade than a useful one.
  • Several key buffs (Thermal Activation's Crit DMG, Stun Trauma on her Ultimate) need SS rank.

Notable dupes · Rank

SS
Solid upgrade

Thermal Activation (+30% Crit DMG and bonus Fire DMG on every crit), 5 Stun Trauma after her Ultimate, and a stronger leader skill (-4.5s instead of -3.5s).

SSS
Optional

Primed Charge: releasing on the 3rd charge sequence adds 20% DMG and 100% Move Speed for 3s.

Community

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